The role of central and peripheral vision in postural control during walking

Three hypotheses have been proposed for the roles of central and peripheral vision in the perception and control of self-motion: (1) peripheral dominance, (2) retinal invariance, and (3) differential sensitivity to radial flow. We investigated postural responses to optic flow patterns presented at different retinal eccentricities during walking in two experiments. Oscillating displays of radial flow (0 degree driver direction), lamellar flow (90 degrees), and intermediate flow (30 degrees, 45 degrees) patterns were presented at retinal eccentricities of 0 degree, 30 degrees, 45 degrees, 60 degrees, or 90 degrees to participants walking on a treadmill, while compensatory body sway was measured. In general, postural responses were directionally specific, of comparable amplitude, and strongly coupled to the display for all flow patterns at all retinal eccentricities. One intermediate flow pattern (45 degrees) yielded a bias in sway direction that was consistent with triangulation errors in locating the focus of expansion from visible flow vectors. The results demonstrate functionally specific postural responses of both central and peripheral vision, contrary to the peripheral dominance and differential sensitivity hypotheses, but consistent with retinal invariance. This finding emphasizes the importance of optic flow structure for postural control regardless of the retinal locus of stimulation.     

The Relationship Between the Child and Adolescent Functional Assessment Scale (CAFAS) and Indicators of Functioning

We investigated the relationship between scores on the Child and Adolescent Functional Assessment Scale (CAFAS) and several indicators of functioning assessed in the national evaluation of the demonstration grants funded by the Center for Mental Health Services System of Care Initiative. The sample included 3187 youths, ranging in age from 4 to 23, with serious emotional disturbance (SED) who were evaluated at intake. At 6 month post-intake, 873 of these youths were re-evaluated. As predicted, higher CAFAS scores were associated with previous psychiatric hospitalization, more serious psychiatric diagnoses, and more restrictive living arrangements. Youths in residential inpatient settings were significantly more impaired than youths living in their own home or in regular foster care. Below average school performance, poor attendance, and contact with law enforcement personnel were also associated with greater impairment. Youth's total CAFAS scores decreased significantly from intake to 6 months. These results indicate that the CAFAS is a measure of functioning which has both statistical and clinical significance.     

ESTABLISHMENT OF NONDELUSIONAL RESPONSES IN A SOCIALLY WITHDRAWN CHRONIC SCHIZOPHRENIC1

Multiple treatment interventions including instructions, modelling, timeout, avoidance of repetition, and reinforcement were successful in establishing factual answers to personal background questions in a withdrawn and socially unresponsive chronic schizophrenic. The subject had previously persisted in giving only delusional responses to these questions. A multiple-baseline design across verbal replies to personal background questions demonstrated that the changes in behavior were brought about by the treatment interventions. During baseline, the subject was reinforced for any response to four questions. The experimental interventions were then introduced for the first question and moved sequentially to an additional question when the subject's responses reached the criterion of at least 80% correct for two consecutive sessions. Introduction of the experimental interventions produced an increase from a baseline level of zero to at least 80% correct for each question. The use of the token reinforcement procedure was faded out after the subject was able to answer all four questions correctly at least 80% of the time for two consecutive sessions. Fading of the token reinforcement procedure was accomplished by using increasingly intermittent schedules of token reinforcement during the last seven sessions. In the final session, no tokens were used to reinforce the subject's responding. Nine-, ten-, and 12-month followup interviews were conducted to evaluate the maintenance of treatment gains. Maintenance was found to be complete at the nine- and 10-month followups, but at the 12-month followup interview, the subject answered one question incorrectly. This study replicates an investigation previously reported in this journal.     

Competence,guilt, and victimization: Sex differences in attribution of causality in television dramas

Sex differences in attribution of causality are investigated in three types of television programs: prime-time family, violent, and daytime serial shows. Both frequency and type of causal statements were studied, using DeCharm's conceptualization of personal causation as origin-like (internal to the self) or pawn-like (external to the self). There were striking sex differences in violent programs, with males modeling more origin behavior and females modeling more pawn behavior. In soap operas there were no sex differences, but both origin and pawn ideas were expressed in terms of personal responsibility, with fewer references to more competent origin behaviors such as goal setting, planned decision making, or self-confidence. These findings have implications for differential socialization of competent coping skills for males and females.The authors would like to express appreciation to Katie Henry and Jennifer Mardoyan, who assisted with this research.     

Familiarity and organization of category terms in semantic memory

In order to determine production frequencies for various category terms, 219 college students were asked to generate category terms (e.g. Automobiles, Vegetables, Relatives) during a 4-rain period. The production frequency (i.e., the number of subjects who listed a particular term) for a given category term may be considered as reflecting the familiarity or amount of usage of that category term, and, as such, should be of value to memory researchers in designing experiments. Additionally, examination of the order in which terms were produced showed that subjects "clustered" related category terms, (e.g., "Countries" and "States" were often produced successively). This clustering of category terrms is supportive of the hypothesis that categories are organized in semantic memory in some kind of higher order structure.     

Women's language: Uncertainty or interpersonal sensitivity and emotionality?

Six differences in linguistic behavior in same-sex and mixed-sex problem-solving groups were explored. Small groups of all women, all men, and mixed sex were run and videotaped. Linguistic behavior was assessed through a content analysis of four syntactic categories: intensifiers, modal constructions, tag questions, and imperative constructions in question form. Support was found for the hypothesis of Key (1975) and Lakoff (1975) that women, as compared with men, use more linguistic categories that connote uncertainty. Support was also found for these authors' hypotheses that (1) women use more linguistic forms that connote uncertainty when men are present than when men are absent, and (2) men are more likely to interrupt women than women are likely to interrupt men. The results are discussed from the perspectives of women's role (supportive behavior and minority status) and women's culture (interpersonal sensitivity and emotionality).This report is a revision of a paper presented at the Pioneers for Century III Conference, Cincinnati, Ohio, April 1976.     

Father and mother contributions to family functioning when the child has a mental delay

Less is known about the father's than the mother's role in family adaptation to children with disabilities. The purpose of this study was to examine relationships of both father and mother use of coping strategies and perceptions of the child with measures of family functioning style. Subjects were 26 families of 30-month-old children with a mental delay and a comparison group of 26 families of same-aged children with no delay. Functioning style for study families showed a balance of cohesion and adaptability; comparison families were more chaotically flexible on the adaptability scale. Mothers and fathers agreed on family functioning style. Study parents made the greatest use of external coping strategies, while in both groups mothers used more external and fathers more internal coping strategies. Relationships between coping and family functioning varied by parent and by group. Results suggest the need for further exploration of the separate needs of fathers and mothers in maintaining balanced family functioning.